Catalytic oxidation of o-phenylenediamine by silver nanoparticles for Resonance Rayleigh scattering detection of mercury (II) in water samples

2021 ◽  
pp. 120258
Author(s):  
Wedad A. Al-Onazi ◽  
Mohamed A. Abdel-Lateef
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Oxidation ◽  
Water Samples ◽  
Rayleigh Scattering ◽  
Resonance Rayleigh Scattering

Facile synthesis of a highly SERS active nanosilver sol using microwaves and its application in the detection of E. coli using Victoria blue B as a molecular probe

2016 ◽  
Vol 8 (24) ◽  
pp. 4881-4887 ◽  
Author(s):  
Yaohui Wang ◽  
Xinghui Zhang ◽  
Guiqing Wen ◽  
Aihui Liang ◽  
Zhiliang Jiang
Keyword(s):  
Silver Nanoparticles ◽  
Raman Scattering ◽  
Rayleigh Scattering ◽  
Molecular Probe ◽  
Resonance Rayleigh Scattering ◽  
Facile Synthesis ◽  
E Coli ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

A green microwave procedure was developed to synthesize highly surface-enhanced Raman scattering (SERS) active silver nanoparticles (AgNPs) with a resonance Rayleigh scattering (RRS) peak at 450 nm, and a new SERS enhancement mechanism was proposed.

A Dithiothreitol-Modified Nanogold Resonance Rayleigh Scattering Spectral Probe for Detection of Trace Cr(VI)

2013 ◽  
Vol 668 ◽  
pp. 370-374
Author(s):  
Jin Qiao Long ◽  
Li Li Xu ◽  
Bin Chen ◽  
Ai Hui Liang ◽  
Zhi Liang Jiang
Keyword(s):  
Waste Water ◽  
Detection Limit ◽  
Water Samples ◽  
Rayleigh Scattering ◽  
Sodium Citrate ◽  
Regression Equation ◽  
Resonance Rayleigh Scattering

Cr(VI); dithiothreitol; Nanogold; Resonance Rayleigh scattering spectral assay. Abstract. Nanogold (NG) in size of 15 nm was prepared by sodium citrate procedure, and it was modified by 1,4-dithiothreitol (DTT) to form NG-DTT probe for Cr(VI). In diluted H2SO4 medium, the probe interacted with Cr(VI) to form big NG clusters that led to the resonance Rayleigh scattering (RS) peak at 720 nm increased greatly. Under the selected conditions, the increased RS intensity (ΔI720nm) is linear to Cr(VI) concentration in the range of 10-50 nmol/L, with a regression equation of ΔI720nm= 2.05 C-7.5, coefficient of 0.9989, and a detection limit of 5 nmol/L. This nanogold RS method was applied to determination of Cr(VI) in waste water samples, with satisfactory results.

A New and Sensitive Hydride Generation-Nanosilver Resonance Rayleigh Scattering Spectral Method for Trace Se (IV)

2013 ◽  
Vol 734-737 ◽  
pp. 2456-2459
Author(s):  
Shan Shan Huang ◽  
Ai Hui Liang ◽  
Mei Ling Tang ◽  
Zhi Liang Jiang
Keyword(s):  
Detection Limit ◽  
Spectral Method ◽  
Water Samples ◽  
Rayleigh Scattering ◽  
Hydride Generation ◽  
Resonance Rayleigh Scattering ◽  
Hcl Solution

In HCl solution, the Se (IV) was reduced to SeH2 by NaBH4, and absorbed by solution of ethanol-AgNO3. The Ag+ was reduced to nanosilver, which led to the resonance Rayleigh scattering (RRS) peak at 366 nm increased. Under the selected conditions, the RRS intensity at 366 nm was linear to the concentration of Se (IV) in the range of 0.05-2.0 μg/mL, a detection limit of 0.02 μg/mL. The proposed method was applied to detect Se (IV) in water samples, with satisfactory results.

Nanogold Resonance Rayleigh Scattering Method for NO2- Based on the Phenylenediamine Diazotization

2013 ◽  
Vol 631-632 ◽  
pp. 22-25 ◽  
Author(s):  
Zhi Liang Jiang ◽  
Jin Chao Dong ◽  
Ai Hui Liang
Keyword(s):  
Water Samples ◽  
Rayleigh Scattering ◽  
Resonance Rayleigh Scattering ◽  
Scattering Method ◽  
Azo Compound ◽  
Weak Force ◽  
Strong Resonance ◽  
Strong Forces

There are strong forces between phenylenediamine (PPD) and nanogold particle (AuNP) that make the AuNPs aggregation and exhibit a strong resonance Rayleigh scattering (RRS) peak at 368 nm. When there is NO2-, it reacts with PPD to generate an azo compound. However, there is weak force between AuNP and the azo compound that can’t make the AuNPs aggregation. When concentration of NO2- increased, the AuNP aggregations become weak that led the RRS peak to decrease. The decreased RRS intensity is linear to NO2-concentration in the range of 1-25 μmol/L. This method was applied to analysis of water samples with simplicity.

Resonance Rayleigh Scattering Spectral Method for Trace Fe3+ Using 1, 4-Dithiothreitol-Modified Nanogold as Probe

2012 ◽  
Vol 260-261 ◽  
pp. 701-706
Author(s):  
Gui Qing Wen ◽  
Liang Qin Wu ◽  
Zhi Liang Jiang
Keyword(s):  
Detection Limit ◽  
Spectral Method ◽  
Correlation Coefficient ◽  
Water Samples ◽  
Rayleigh Scattering ◽  
Regression Equation ◽  
Resonance Rayleigh Scattering

1, 4-dithiothreitol (DTT) combined with nanogold (AuNP) to form the DTT-AuNP probe in the solution of 1.0 mmol/L H2SO4. In the presence of Fe3+, the DTT-AuNPs aggregated to big particles that exhibited a maximum Resonance Rayleigh scattering (RRS) peak at 770 nm. Under the chosen conditions, the increased intensity was linear to Fe3+ concentration in the range of 7.3-149.5µg/L, with the regression equation of ΔI770nm = 127.5C +11.2, the correlation coefficient of 0.9954 and the detection limit of 3.75 ug/L Fe3+. The proposed method was applied to detect trace Fe3+ in water samples, with satisfactory results.

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